Reform do not say kaddish for terrorists, and there are no videos of any Reform synagogue doing so.
Reform is a foreign religion, no different from Islam or Buddhism, but it so happens that a very large percentage of its members are Jewish by birth, with Jewish neshamos. That percentage is probably less than 50%, but still very high. The same is probably true of Buddhism in NY; there’s a very good chance that a randomly selected NY Buddhist, if s/he appears to be white, is a Jew. We have to love the Jew, but we have no connection at all to the religion s/he is practicing.
The Hirsh gang within NK (not the real NK) are ochrei yisroel; they actively collaborate with the enemies of the Jewish nation, which makes them traitors. If we know they’re Jewish we need to have pity on their neshamos.